vocab, 1,2,3,4

Question 1

Deposition

Answer 1

Deposition is the laying down of sediment carried by wind, flowing water, the sea or ice. Sediment can be transported as pebbles, sand and mud, or as salts dissolved in water.

Question 2

Ductile

Answer 2

(of a metal) able to be drawn out into a thin wire.

Question 3

Colloid

Answer 3

the particles do not settle, and cannot be separated out by ordinary filtering

Question 4

Sublimation

Answer 4

change directly into vapor when heated, typically forming a solid deposit again on cooling.

Question 5

Malleable

Answer 5

(of a metal or other material) able to be hammered or pressed permanently out of shape without breaking or cracking.

Question 6

Conductivity

Answer 6

the degree to which a specified material conducts electricity,

Question 7

Suspension

Answer 7

a system consisting of small particles kept dispersed by agitation

Question 8

Electron shells

Answer 8

the outside part of an atom around the atomic nucleus.

Question 9

Atomic number

Answer 9

the number of protons in the nucleus of an atom, which determines the chemical properties of an element and its place in the periodic table.

Question 10

Atomic mass unit

Answer 10

a unit of mass used to express atomic and molecular weights, equal to one-twelfth of the mass of an atom of carbon-12. It is equal to approximately 1.66 x 10-27 kg.

Question 11

Alkali metals

Answer 11

any of the elements lithium, sodium, potassium, rubidium, cesium, and francium, occupying Group IA (1) of the periodic table. They are very reactive, electropositive, monovalent metals forming strongly alkaline hydroxides.

Question 12

Alkaline-earth metals

Answer 12

any of the elements beryllium, magnesium, calcium, strontium, barium, and radium, occupying Group IIA (2) of the periodic table. They are reactive, electropositive, divalent metals, and form basic oxides which react with water to form comparatively insoluble hydroxides.

Question 13

Halogens

Answer 13

any of the elements fluorine, chlorine, bromine, iodine, and astatine, occupying group VIIA (17) of the periodic table. They are reactive nonmetallic elements that form strongly acidic compounds with hydrogen from which simple salts can be made.

Question 14

Neutrons

Answer 14

a subatomic particle of about the same mass as a proton but without an electric charge, present in all atomic nuclei except those of ordinary hydrogen.

Question 15

Protons

Answer 15

a stable subatomic particle occurring in all atomic nuclei, with a positive electric charge equal in magnitude to that of an electron, but of opposite sign.

Question 16

Nucleus

Answer 16

the central and most important part of an object, movement, or group, forming the basis for its activity and growth.

Question 17

Polyatomic ion

Answer 17

A polyatomic ion is an ion composed of two or more atoms.

Question 18

Molecular compound

Answer 18

A molecular compound consists of molecules whose formula represents the actual number of atoms bonded together in the molecule. The atoms are joined to give a definite shape which is defined by the angles between the bonds and by the bond lengths.

Question 19

Combustion

Answer 19

rapid chemical combination of a substance with oxygen, involving the production of heat and light.

Question 20

Cellular respiration

Answer 20

process by which organisms combine oxygen with foodstuff molecules, diverting the chemical energy in these substances into life-sustaining activities and discarding, as waste products, carbon dioxide and water. Organisms that do not depend on oxygen degrade foodstuffs in a process called fermentation. (For longer treatments of various aspects of cellular respiration, see tricarboxylic acid cycle and metabolism.)

Question 21

homogeneous

Answer 21

homogeneous means that the properties of a system are the uniform throughout the entire system

Question 22

heterogeneous

Answer 22

heterogeneous (also inhomogeneous) means that the properties change within the system.

Question 23

Ionic compounds

Answer 23

Ionic compounds contain ions and are held together by the attractive forces among the oppositely charged ions.